Method of manufacturing carrier rings for solid-rubber tires



M. HEHING. METHOD v0F MANUFACTURING CARRIER RINGS FOR soun RUBBER TlREs.

APPLICATION FILED SEPT. I7, 1921. 1,413,331 Patented Apr. 18, 1922i.

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MAX HERING, OF RO'NNEBUB/G, SACHSENALTENBURG, GERMANY.

METHOD OF MANUFACTURING CARRIER RINGS `SFOR SOLID-RUBBER TIRES.

Specicationof Letters Patent. Patented Apr. 18, 1922.

Application led September 17, 1921. Serial No. 501,479.

To all 'whom it 'may cof/wem.'

Be it known that I, MAX HERING, a citizen of the German Republic, andresiding at Ronneburg, Sachsen-Altenburg, Germany, have invented new anduseful Improvements in a Method of Manufacturing Carrier vRings forSolid-Rubber Tires, for which I v have filed application' in Germany onthe 18th of February, 1920,y and of which the following is aspecication.

My invention relates to carrier rings for solid rubber tires which arevulcanized on,

, which carrier rings are pressed onto vehicle wheels laterally in thewell known manner. It is the object of my invention to provide a methodof producinv such carrier rings out of fiat material. Moreover, my novelmethod enables me to dispense with comparatively expensive turning workby using a fiat material having those grooves into which the rubber tireis to be vulcanized, produced during the treatment of said flat materialwithin the rolling mills, and impartingto the rin the required accuratein'- 'ternal diameter. y radially forcing said ring on to a core piece.Y

I-Iitherto, such carrier rings have been rolled in alseamle form. Thismethod of manufacture produces tires which, in its true, answer allrequirements in every'respect, but is expensive inl itself., The'carrier rings have, for this reason, also been bent .up out of iatmaterial and the ends welded to each other in a fire.4 The disadvantage'of 'this fire welding is, however, that the parts in theI vicinity oithe Welded joints become too highly heated. This disadvantage becomesfrequently manifest in practlce by the carrier rings bursting eitherwhen ressed on or during running. If this burst- 1n takes place whenthering with the ltire is eing laterall the expensive ru ber tire isthereby wasted. In the electrical method of butt welding it is true thatthe danger of excessive heating outside the welded jointv is avoided,but the electrical method of welding lacks the rolling into each otherof the masses of-ma- -terlal which are to be connected togetherl andwhich is necessary for a weld which will withstand tensile strains.- Forthese reasons kthe electrical method of bua welding has h itherto notbeen suitable for such carrier 'It is another object of mypresentnvenpressed on to the wheel,

tion to make the electrical method of butt weldmg s uitable for carrierrings of the present kind and it consists in providing the ends of thejoint, which are to be butt welded to each other, previous to welding,with Inter-locking and undercut teeth which wlll .stand the tensilestrains to which the ring 1s subjected, and in this way'relieve thewelded seam of strain.

An example of the manner in which the invention is carried out isillustrated in the accompanying drawings, in which:

Figure 1 1s an axial transverse section through a wheel with the carrierring accordmg to the presentl invention and side.

Figure 3 shows the carrier ring in longitudinal section withl anelevation of the joint.

Figure 4 illustrates the manner of compressing the ring to an accuratediameter by forcing it upon a core piece.

The carrier ring a is provided on its external circumference withgrooves f into which the solid rubber tire b isy vulcanized. The ring ais bent up out of flat steel, `the ends of which interlock by means ofundercut teeth c and d. Afterthis connection has been effected the teethare welded to each Figure 2 isa partial' elevation from the other bymeans of the method of electrical vlapart or. may consist of a singlepiece. In

the latter case the compressed ring is removed from the core piecee bybeing forced oipit lateral-ly.

According to the present invention the grooves f are rolled in the flatsteel when it 1s bein manufactured and before it is bent up to orm thering so that the carrier ring is produced in a purely mechanical wayandof dimensions which are fixed once and `for all and are not dependentupon the varying attention of the workman.

- .What I claim as my invention and desire 110 to secure by LettersPatent'o the United States of America, is

1. A method of manufacturing a carrier ring for a solid rubber tire,consisting in, bending a cut length of flat steel into a ring, cuttinginto the ends of said ring interengaging teeth, and Welding said endsafter said teeth have been joined so as to engage each other. .n

2. A method of manufacturing a carrier rin for a solid rubber tire,consisting in, conjointly rollin into a fiat steel and grooves Whilesa1d flat steel band is being rolled out to final dimensions, bending acut length of said flat steel -into a ring, cutting into the ends ofsaid ring interen aging teeth, and welding said ends after sai teethhave been joined so as to engage each other.

3,. A method of manufacturing a carrier ring for a solid rubber tire,consisting in, bending a cut length of flat steel into a ring, cuttinginto the ends of said ring interengaging teeth, and electrically buttWelding said ends after said teeth have been joined so as to engage eachother. Y

4. A method of manufacturing a carrier ring for a solid rubber tire,consisting in, conjointly rolling into a flat steel band grooves whilesaid fiat steel band is bemg i-,mspasi p rolled out to final dimensions,bending a cut length of said fiat steel into a ring, cutting into `theends of said ring interengaging teeth, and electrically buttwelding saidends after said teeth have been joined so as to engage each other.

5. A method of'manufacturing a carrier ring for a solid rubber tire,consisting in,

bending a cut length of flat steel into a ring,

cutting into th'e ends of said ring interengaging teeth, Welding saidends after said teeth have been joined so as toen age each other, andcompressing said so weded ring to the required accurate internaldiameter by radially forcing it upon a core piece. l

6. A method of manufacturing a'carrier MAX HERING.

bending a cut' .ring for a solid rubber tire, consisting in, n

